/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.state.api.output;

import org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.checkpoint.OperatorSubtaskState;

import java.util.Objects;

/**
 * A simple wrapper pojo that tags {@link OperatorSubtaskState} with metadata.
 */
@Internal
@SuppressWarnings("WeakerAccess")
public final class TaggedOperatorSubtaskState {

	public int index;

	public OperatorSubtaskState state;

	public TaggedOperatorSubtaskState(int index, OperatorSubtaskState state) {
		this.index = index;
		this.state = state;
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) {
			return true;
		} else if (o == null || getClass() != o.getClass()) {
			return false;
		}

		TaggedOperatorSubtaskState that = (TaggedOperatorSubtaskState) o;
		return index == that.index &&
			Objects.equals(state, that.state);
	}

	@Override
	public int hashCode() {
		return Objects.hash(index, state);
	}

	@Override
	public String toString() {
		return "TaggedOperatorSubtaskState{" +
			"index=" + index +
			", state=" + state +
			'}';
	}
}


